overlay: BOARD_USE_LEGACY_TOUCHSCREEN device tree flag.

-Everytime I repo sync my framework base commit to fix the touch screen
gets wiped out. In order to preserve it, I'm putting it in the overlay.
overlay: SlimCenter overlay for ota.

-I've found that with just a few small adjustments you can redirect
SlimCenter to another url to check for updates.
clean up: movefiles.sh is no longer needed...